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Sister Knows Best: When a Dildo Just Isn't Big Enough

Chapter One: The Assignment

The shared living room of the siblings was a familiar space, filled with the comfortable hum of everyday life. But today, there was an electric charge in the air. The brother, feeling frisky, turned to his sister with a mischievous glint in his eye.

"Hey sis, how about a little playful ass-stroking?" he asked, a smirk playing on his lips.

She raised an eyebrow, intrigued by his boldness. "Is that all you can handle, wimp?" she replied, unable to resist a playful jab.

He persisted, "Come on, don't be like that. How about we take it to the next level? Maybe with a little help from a dildo?"

Her eyes widened, but she couldn't deny the spark of curiosity that flickered within her. "Alright, fine. But you're going to have to get into the doggy style position. I'm in charge here."

He obeyed, eager to see where this was going. She selected a dildo of modest length and girth, teasing him with a raised eyebrow. "Let's see if this fits your needs, little brother."

With that, she began to penetrate him, each thrust hitting his hanging balls with a satisfying thwack. He moaned with pleasure, but she wasn't satisfied yet.

"You want more, huh?" she taunted, replacing the dildo with a larger one. He gasped, but she didn't stop there.

She continued her assault, mercilessly pounding him with the larger dildo. "Too much for you?" she sneered, but he begged for even more.

She grabbed the horse dildo, the largest of them all, and gave him a warning. "This is going to hurt, you know."

But he was insatiable, begging her to impale him with the horse dildo. She did, causing him to cry out in ecstasy and pain. She watched him, amused, as he struggled to take it all in.

"You asked for it," she smirked, pulling out the horse dildo and leaving him panting and begging for more.

She shook her head, laughing. "That's enough for today, little brother. You need to learn to take it slow."

And with that, the playful encounter came to an end, leaving them both breathless and satisfied.

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